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BUTTON HOLE SEWING MAGHINE. N0. 296.626. Patented Apr. 8, 1884.

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BUTTON'HOLE SEWING MACHINE. I I No. 296,626. Patented Apr. 8, 1884.

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GEORGE S. ROMINGER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEAMERICAN BUTTONHOLE, OVERSEAMING AND SEWING MACHINE COMPANY, OF SAMEPLACE.

BUTTON-HOLE SEVVl'NG-MACl-HNE.

SPECIFICATION forming part of Letters Fatent No. 296,626, dated April 8,1884.

(X model.)

To all whom, it may concern.-

Be it known that I, GEORGE S. ROMINGER, a citizen of the United States,and a resident of Philadelphia, Pennsylvania, have invented certainImprovementsin Button-Hole Sewing Machines, of which the following is aspecification.

y invention relates to certain improve ments in the American Button-HoleSewing- Machine, my improvements comprising cer tain details in theconstruction 'of different parts of the machine, as describedhereinafter.

In the accompanying drawings, Figure 1, Sheet 1, is a plan View ofthetable or bed ofthe I 5 machine with my improvements; Fig. 2, an inverted plan view of the same; Fig. 3, a perspective view ofthepresser-foot; Fig. 4, a per spective View of the edge guide andfolder, Fig. 5, a front view of the same; Fig. 6, a sectional view ofthe pivoting device for the looper-arm; Fig. 7, Sheet 2, a transversesection on the line 1 2, Fig. 1, but drawn to a larger scale; and Fig.8, an inverted perspective view of the feed mechanism on the same scaleas Fig. 7. Fig. 9, Sheet 3, is a sectional plan view, and Fig. 10 alongitudinal section on the line 3 4, Fig.9, of sufficient of themachine to show the needle and looper, and to illustrate their relationto each other and to the feed-plate.

A is the table or bed of the machine, on the under side of which areformed bearings for the driving-shaft B, the latter having, as usual,two cams, B and B the former for operating the needle-arm, and the cam13 for actuating the loopcr-arm D, Fig. 2. Said arm D is hung to abracket, a,on the under side of the table, by means of a bolt, 6, whichpasses through a central opening in the hub of the arm, and

through an opening in the bracket to, part of the opening in the hubbeing tapered for adaptation to the tapered head of the bolt, as shownin Fig. 5. The end of the bolt is threaded for the reception of the nutb, which bears against the bracket and serves to maintain a snug fit ofthe hub on the bracket and a like fit of the bolt in the hub, so as tocompensate for the effects of wear, loosening of the bolt beingprevented by a setscrew, b. The

thread for the looper passes from aspool suitably located above thebase-plate A through an eye or loop, 6, thence between tensiondisks f,thence through an opening, e, in the plate A, thence through an eye in alug, d, beneath the said plate, and finally through an eye on a spring,(I. The friction-disks f are carried by a bolt, f, secured to a stud, f,on the bed-plate, said bolt being threaded for the reception of a nut,f, between which and the inner plate,f,intervenes a coiled spring, fflsothat by properly manipulating the nut f the pressure exerted by saidspring upon the frictionplatef can be readily governed, and the degreeof tension imparted to the thread there by regulated. The nut f isslotted, and is adapted to grip the bolt j", so that the frictionexerted will prevent the accidental loosening of the nut.

G is the work-plate of the machine, having the usual opening, 9, for theneedle and looper, and an opening, 9, for the feed-plate H. The needleis represented at a; in Fig. 1.

Instead of making the opening and plate of uniform width throughout,however, I enlarge the opening in the rear of the needle, as shown at 9Figs. 1 and 9, and form on the feed-plate H a projection, H, adapted tothis enlarged porti on of the opening and projecting laterally beyondthe needle, as shown in Fig. 1, so as to provide for a more effectivefeed than usual of the fabric which is being sewed, owing to the hold ofthe portion H of the feedplate on the fabric immediately in the rear ofthe needle and laterally beyond the same.

Machines of the character shown in the drawings are extensively usedinoverseaming the edges of blankets, &c., and in order to provide for theproper turning or folding of the edge of the blanket prior to theoverseaming of the same, I combine with the sewing and feeding mechanismof the machine an edge guide and turner, J,which may be similar ingeneral construction to the usual hemming attachments ofsewing-machines. I pro vide the device, however, with an adjustablegage-plate, i, Fig. 4, said plate being secured by means of a sensor-cw,1?, to the base of the guide. The guide J has a projecting plate, J,

and the plate t has a portion, 43*", overhanging said projection, andconstructed to form an edge-turner in the same manner as the guide J. Byadjusting the plate 73 in respect to the guide J, therefore, thecharacter of the turned or folded edge may be varied.

The use of thefeed-plate with projection H, in combination with the edgeguide and turner, is an important feature of my invention, as thefeed-plate thus constructed acts upon the fabric up to the very edge,and thus -insures a straight pull of the fabric through the guide. Thepresser-foot K, Fig. 3, has a projection, K, for properly acting uponthe fabric above the projection H of the feed-plate, said projection Kbeing preferably recessed for receiving thehem. The feed-plate iscarried byaguided bar, M, on the under side of the bedplate, as usual,and the necessary vertical and longitudinal reciprocating movements areimparted to said feed-plate by a cam, N, on the shaft B, through themedium of the three levers I, R, and S, all of which are hung to aplate, T, the latter being bolted to lugs on the underside of thebed-plate, and having formedin it the neces'sary openings for thedriving shaft and looper-arm. One arm of the lever l? is acted upon bythe cam N, and the other arm of said lever bears upon the under side ofthe feedbar M, so that as the lever is vibratedavertical movement willbe imparted to the end of the feed-bar which carries the feed-plate, and

upon which said leverl acts. Thelongitudinal reciprocation of thefeed-bar is effected by the action of the cam and thelevers R and S. Thelever B is a bell-crank lever, both arms of which are forked, and theforked end of one arm embraces a pin, m, on the feed-bar, the otherforked arm of the lever embracing a pin, a, on one arm of the lever S,the opposite arm of which is acted upon by the cam. A coiled spring, isconnected at one end to a stud on the pin m, and at the opposite end toa similar stud on the pivot-pin of the lever S, said spring thus tendingto draw the end of the feed-bar downward, and keep the same always inclose contact with the lever P, a further tendency of ward.

the spring being to draw the feed-bar back- In other words, the springacts in opposition to the cam,the tension of the spring being exerted todepress and retract the i'eedplate, while the cam acts to raise saidplate and impart to it the movementnecessary for the feeding operation.The extent of feed andlength of stitch are governed by the adjustment ofa lever, NV, which is pivoted to astud on the under side of thebed-plate, the long arm of said leverprojecting through aslot intheplate, and the short arm carrying a stop, w,which is adapted to comein contact with the upper forked arm of the lever B, and thus restrictthe movemeut of the same in the direction of thearrow, Figs. 6 and 7,therebylimiting theretraction of the feed-bar, due to the action of thespring 19.-

By hanging the levers P, R, and Stoaplate detachably secured to theunder side of the bed-plate, the attachment ofsaid levers to the platecan be effected before the latterissecured in position, and the fittingtogether of the ma chine is thereby materially facilitated.

I claim as my invention- 1. Thecombination of sewingmechanismand thefeed-plate H, having a projection, H, extending laterally beyond theneedle, with the edge guide and turner J, as set forth.

' 2. The combination of the needle and looper of an overseam-sewingmachine, the feed-plate extending laterally beyond the needle, thepresser-foot having a projection, K, and the edge guide and turner J, asset forth.

8. The combination of the shaft 13, having a cam, N, with the feed-bar Mand the levers R," S, and P, as set forth.

4. The'combination of the shaft B, havinga cam, N, the feed-bar M,thelevers Rand S, and the regulating-leverWV, having a stop, w, asspecified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE S. RO'MINGER. Nitn esses:

WM. J. BARR, JAMES W. BARR.

